Yamaha NS-SW310 - Manual (Page 9)

CONTROLS AND THEIR FUNCTIONS
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OUTPUT (TO SPEAKERS) terminals
Can be used for connecting to the main speakers.
Signals from the INPUT1 terminals are sent to these
terminals.
(Refer to “CONNECTIONS” for details.)
INPUT1 (FROM AMPLIFIER) terminals
Used to connect the subwoofer with the speaker
terminals of the amplifier.
(Refer to “CONNECTIONS” for details.)
INPUT2 terminals
Used to input line level signals from the amplifier.
(Refer to “CONNECTIONS” for details.)
INPUT3 (LFE) terminals
The HIGH CUT control
has no effect on the
signals inputted to these terminals. (See Page 7 for
details)
PHASE switch
This switch is to be set to the REV (reverse) position.
However, depending on your speaker system or
listening condition, there may be a case when better
sound quality is obtained by setting this switch to the
NORM (normal) position. Select the best position by
ear.